PEM bipolar plate airtightness detection assembly

Abstract

The utility model discloses a PEM bipolar plate airtightness detection assembly, and particularly relates to the technical field of airtightness detection, the PEM bipolar plate airtightness detection assembly comprises an independent rack, a high-pressure gas storage tank is fixedly arranged on the inner wall of the bottom of the independent rack, and a detection loop fixing plate fixed in the independent rack is arranged behind the high-pressure gas storage tank. A first high-pressure reducing valve, a second high-pressure reducing valve and a third high-pressure reducing valve which are sequentially distributed from top to bottom are fixedly arranged on one side of the independent rack in a penetrating mode. A hydrogen cavity, a water oxygen cavity, a first high-pressure pneumatic control valve, a second high-pressure pneumatic control valve, a third high-pressure pneumatic control valve, a fourth high-pressure pneumatic control valve, a fifth high-pressure pneumatic control valve, a sixth high-pressure pneumatic control valve, a seventh high-pressure pneumatic control valve, an eighth high-pressure pneumatic control valve, a ninth high-pressure pneumatic control valve, a tenth high-pressure pneumatic control valve, an eleventh high-pressure pneumatic control valve and a twelfth high-pressure pneumatic control valve are fixedly arranged on the detection loop fixing plate. The system comprises a high-pressure pneumatic control valve 13, an external leakage flowmeter, a series leakage flowmeter, a shunting block I, a shunting block II and a gas path block. The device is reliable in test result and can be placed at various positions according to occasions.

Description

Technical Field

[0001] The utility model relates to the technical field of airtight detection, in particular to an airtight detection component for a PEM bipolar plate. Background Art

[0002] The existing hydrogen energy (electrolyzer) industry is growing rapidly, and has been comprehensively developed and improved in many aspects. There are various methods for testing the airtightness of existing electrolyzers, but the PEM bipolar plate testing products are relatively large, the testing pressure is too high, and there are few cases available for reference on the market. As a key equipment for large-scale hydrogen production from renewable energy, the electrolyzer accounts for nearly 50% of the total cost of the hydrogen production system, so the airtightness test of the PEM bipolar plate plays a key role in the promotion of the entire electrolyzer.

[0003] However, the existing airtightness detection equipment is inefficient and cannot automatically test the airtightness of the PEM bipolar plate with one click. Manual operation is required by staff, which will lead to unreliable and inaccurate test results. Based on this, the utility model provides a PEM bipolar plate airtightness detection component. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a PEM bipolar plate airtight detection component, which has a simple airtight loop structure, low environmental requirements, strong anti-interference ability, and a small detection loop footprint. It can be installed in various positions according to occasions. The airtight detection loop has the characteristics of simple connection, easy-to-understand control principle, high efficiency, and reliable test results. It solves the problems of heavy PEM bipolar plate detection equipment, large footprint, inconvenient maintenance, inspection and movement.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a PEM bipolar plate airtight detection component, comprising an independent frame, a high-pressure gas storage tank is fixedly provided on the inner wall at the bottom of the independent frame, a detection circuit fixing plate fixed in the independent frame is provided behind the high-pressure gas storage tank, a high-pressure pressure reducing valve 1, a high-pressure pressure reducing valve 2, and a high-pressure pressure reducing valve 3 are fixedly penetrated on one side of the independent frame and are distributed in sequence from top to bottom, a hydrogen chamber, a water-oxygen chamber, a high-pressure gas control valve 1, a high-pressure gas control valve 2, a high-pressure gas control valve 3, a high-pressure gas control valve 4, a high-pressure gas control valve 5, a high-pressure gas control valve 6, a high-pressure gas control valve 7, a high-pressure gas control valve 8, a high-pressure gas control valve 9, a high-pressure gas control valve 10, a high-pressure gas control valve 11, a high-pressure gas control valve 12, a high-pressure gas control valve 13, an external leakage flowmeter, a cross-leakage flowmeter, a shunt block 1, a shunt block 2, and a gas path block are fixedly provided on the detection circuit fixing plate.

[0006] In a preferred embodiment, the high-pressure gas storage tank is connected to high-pressure reducing valve 1, high-pressure reducing valve 2, and high-pressure reducing valve 3 through diverter block 1, and the high-pressure reducing valve 1, high-pressure reducing valve 2, and high-pressure reducing valve 3 are respectively connected to high-pressure gas control valve 1, high-pressure gas control valve 2, and high-pressure gas control valve 3 through diverter block 1.

[0007] In a preferred embodiment, the high-pressure gas-controlled valve 1, the high-pressure gas-controlled valve 2, and the high-pressure gas-controlled valve 3 are connected to the external leakage flow meter and the high-pressure gas-controlled valve 5 through the diverter block 2.

[0008] In a preferred embodiment, the high-pressure gas control valve 4 is connected to the front end of the external leakage flow meter for front-end exhaust, and the high-pressure gas control valve 6 is connected to the rear end of the external leakage flow meter for rear-end exhaust.

[0009] In a preferred embodiment, the high-pressure gas-controlled valve five is respectively connected to the high-pressure gas-controlled valve seven, the high-pressure gas-controlled valve eight, and the high-pressure gas-controlled valve nine through the gas circuit block, the high-pressure gas-controlled valve eight is connected to the hydrogen chamber, the high-pressure gas-controlled valve nine is connected to the water-oxygen chamber, the hydrogen chamber is connected to the string leakage flowmeter through the high-pressure gas-controlled valve twelve, and the hydrogen chamber is connected to the string leakage flowmeter through the high-pressure gas-controlled valve thirteen.

[0010] In a preferred embodiment, the high-pressure gas-controlled valve ten is communicated with the hydrogen chamber, and the high-pressure gas-controlled valve eleven is communicated with the water-oxygen chamber.

[0011] In a preferred embodiment, a pressure transmitter for detecting the circuit pressure is fixedly provided on the gas circuit block.

[0012] In a preferred embodiment, a precision pressure reducing valve, a first high-pressure muffler and a second high-pressure muffler are fixedly provided on the detection circuit fixing plate.

[0013] Technical effects and advantages of the utility model:

[0014] 1. Compared with the existing traditional airtight detection circuit, this airtight circuit has a simple structure, low environmental requirements, strong anti-interference ability, and a small detection circuit footprint, and can be placed in various locations according to occasions.

[0015] 2. The airtight detection circuit has the characteristics of simple connection, easy-to-understand control principle, high efficiency and reliable test results, which solves the problems of heavy PEM bipolar plate detection equipment, large footprint, inconvenient maintenance, inspection and movement.

[0016] 3. Through the coordination of various components, airtightness detection is carried out, and the pressure difference method and flow method are applicable at the same time. The pressure difference method can be used to test the leakage of the hydrogen chamber and the water-oxygen chamber, and the flow method can be used to test the leakage of the hydrogen chamber, the leakage of the water-oxygen chamber, the hydrogen chamber connecting with the water-oxygen chamber, and the water-oxygen chamber connecting with the hydrogen chamber, thereby greatly improving the use function of this component. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 Schematic diagram of pipeline distribution of the utility model Figure 1 ;

[0019] Figure 3 Schematic diagram of pipeline distribution of the utility model Figure 2 ;

[0020] Figure 4 Schematic diagram of pipeline distribution of the utility model Figure 3 ;

[0021] Figure 5 It is the principle diagram of the utility model.

[0022] The accompanying drawings are marked as follows: 1. Independent rack; 2. High-pressure gas storage tank; 3. Detection circuit fixing plate; 4. High-pressure pressure reducing valve one; 5. High-pressure pressure reducing valve two; 6. High-pressure pressure reducing valve three; 7. Hydrogen chamber; 8. Water-oxygen chamber; 9. High-pressure gas control valve one; 10. High-pressure gas control valve two; 11. High-pressure gas control valve three; 12. High-pressure gas control valve four; 13. High-pressure gas control valve five; 14. High-pressure gas control valve six; 15. High-pressure gas control valve seven; 16. High-pressure gas control valve eight; 17. High-pressure gas control valve nine; 18. High-pressure gas control valve ten; 19. High-pressure gas control valve eleven; 20. High-pressure gas control valve twelve; 21. High-pressure gas control valve thirteen; 22. External leakage flowmeter; 23. String leakage flowmeter; 24. Diverter block one; 25. Diverter block two; 26. Gas circuit block; 27. Precision pressure reducing valve; 28. High-pressure muffler one; 29. ​​High-pressure muffler two. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Refer to the instruction manual Figure 1-5 The utility model provides a PEM bipolar plate airtightness detection assembly, comprising an independent frame 1, a high-pressure gas storage tank 2 is fixedly provided on the bottom inner wall of the independent frame 1, and a detection circuit fixing plate 3 fixed in the independent frame 1 is provided behind the high-pressure gas storage tank 2;

[0025] One side of the independent frame 1 is fixedly penetrated with a high-pressure reducing valve 1 4, a high-pressure reducing valve 2 5, and a high-pressure reducing valve 3 6 which are distributed in sequence from top to bottom; a hydrogen chamber 7, a water-oxygen chamber 8, a high-pressure gas-controlled valve 1 9, a high-pressure gas-controlled valve 2 10, a high-pressure gas-controlled valve 3 11, a high-pressure gas-controlled valve 4 12, a high-pressure gas-controlled valve 5 13, a high-pressure gas-controlled valve 6 14, a high-pressure gas-controlled valve 7 15, a high-pressure gas-controlled valve 8 16, a high-pressure gas-controlled valve 9 17, a high-pressure gas-controlled valve 10 18, a high-pressure gas-controlled valve 11 19, a high-pressure gas-controlled valve 12 20, a high-pressure gas-controlled valve 13 21, an external leakage flowmeter 22, a cross-leakage flowmeter 23, a shunt block 1 24, a shunt block 2 25, and a gas circuit block 26;

[0026] Specifically, the high-pressure gas storage tank 2 is connected to the high-pressure pressure reducing valve 1 4, the high-pressure pressure reducing valve 2 5, and the high-pressure pressure reducing valve 3 6 through the shunt block 1 24, and the high-pressure pressure reducing valve 1 4, the high-pressure pressure reducing valve 2 5, and the high-pressure pressure reducing valve 3 6 are respectively connected to the high-pressure gas control valve 1 9, the high-pressure gas control valve 2 10, and the high-pressure gas control valve 3 11 through the shunt block 1 24;

[0027] The high-pressure gas control valve 1 9, the high-pressure gas control valve 2 10, and the high-pressure gas control valve 3 11 are connected to the external leakage flow meter 22 and the high-pressure gas control valve 5 13 through the diverter block 25. The high-pressure gas control valve 4 12 is connected to the front end of the external leakage flow meter 22 for front-end exhaust, and the high-pressure gas control valve 6 14 is connected to the rear end of the external leakage flow meter 22 for rear-end exhaust;

[0028] The high-pressure gas-controlled valve five 13 is respectively connected to the high-pressure gas-controlled valve seven 15, the high-pressure gas-controlled valve eight 16, and the high-pressure gas-controlled valve nine 17 through the gas circuit block 26. The high-pressure gas-controlled valve eight 16 is connected to the hydrogen chamber 7, and the high-pressure gas-controlled valve nine 17 is connected to the water-oxygen chamber 8. The hydrogen chamber 7 is connected to the leakage flowmeter 23 through the high-pressure gas-controlled valve twelve 20, and the hydrogen chamber 7 is connected to the leakage flowmeter 23 through the high-pressure gas-controlled valve thirteen 21;

[0029] The high-pressure gas control valve 10 18 is connected to the hydrogen chamber 7, the high-pressure gas control valve 11 19 is connected to the water-oxygen chamber 8, and a pressure transmitter for detecting the circuit pressure is fixedly provided on the gas circuit block 26;

[0030] In addition, a precision pressure reducing valve 27, a high-pressure muffler 1 28 and a high-pressure muffler 2 29 are fixedly provided on the detection circuit fixing plate 3. The high-pressure muffler 1 28 and the high-pressure muffler 2 29 can reduce the exhaust noise.

[0031] The factory gas source enters the high-pressure gas storage tank 2, and is connected to the high-pressure reducing valve 1 4, the high-pressure reducing valve 2 5 and the high-pressure reducing valve 3 6 through the diverter block 1 24 respectively. The high-pressure reducing valve 1 4, the high-pressure reducing valve 2 5 and the high-pressure reducing valve 3 6 are respectively connected to the high-pressure gas control valve 1 9, the high-pressure gas control valve 2 10 and the high-pressure gas control valve 3 11 through the diverter block 1 24, and then connected to the diverter block 25 and then connected to the gas control valve high-pressure gas control valve 5 13, and the other side is connected to the external leakage flowmeter 22. The high-pressure gas control valve 4 12 is connected to the front end of the external leakage flowmeter 22 for front-end exhaust, and the high-pressure gas control valve 6 14 is connected to the rear end of the external leakage flowmeter 22 for rear-end exhaust. The control valve five 13 is connected to the gas circuit block 26 and is respectively connected to the high-pressure gas control valve seven 15, the high-pressure gas control valve eight 16 and the high-pressure gas control valve nine 17, which are respectively reserved for a detection position and the air inlet end of the test hydrogen chamber 7 and the water-oxygen chamber 8. The other ends of the high-pressure gas control valve eight 16 and the high-pressure gas control valve nine 17 are respectively connected to the high-pressure gas control valve ten 18 and the high-pressure gas control valve eleven 19 through the gas circuit block 26 for exhaust, and the loop pressure is detected by the pressure transmitter installed on the gas circuit block 26. The other side of the gas circuit block 26 is respectively connected to the high-pressure gas control valve twelve 20 and the high-pressure gas control valve thirteen 21, and the high-pressure gas control valve twelve 20 and the high-pressure gas control valve thirteen 21 are connected to the series leakage flowmeter 23.

[0032] The detection assembly can be used to detect leakage of hydrogen chamber 7, leakage of water-oxygen chamber 8, hydrogen chamber 7 flowing into water-oxygen chamber 8, and water-oxygen chamber 8 flowing into hydrogen. The test methods include: pressure difference method and flow method.

[0033] The pressure difference method can be used to test the leakage of the hydrogen chamber 7 and the water-oxygen chamber 8;

[0034] A specific detection method for the leakage of the hydrogen chamber 7 is as follows: by selecting different pressures, one of the high-pressure gas control valve 1 9, the high-pressure gas control valve 2 10 and the high-pressure gas control valve 3 11 is opened respectively, and then the high-pressure gas control valve 5 13 and the high-pressure gas control valve 8 16 are opened. After 24 hours of pressure maintenance, it is checked whether the pressure drop value is within 5%, so as to judge whether the hydrogen chamber 7 is leaking;

[0035] The specific detection method of the leakage of the water-oxygen chamber 8 is as follows: by selecting different pressures, open one of the high-pressure gas control valve 1 9, the high-pressure gas control valve 2 10 and the high-pressure gas control valve 3 11 respectively, and then open the high-pressure gas control valve 5 13 and the high-pressure gas control valve 9 17. After maintaining the pressure for 24 hours, see whether the pressure drop value is within 5%, so as to judge whether the water-oxygen chamber 8 is leaking.

[0036] The flow method can test the leakage of hydrogen chamber 7, the leakage of water-oxygen chamber 8, the connection between hydrogen chamber 7 and water-oxygen chamber 8, and the connection between water-oxygen chamber 8 and hydrogen chamber 7.

[0037] Leakage detection method of hydrogen chamber 7: by selecting different pressures, open one of high-pressure gas control valve 1 9, high-pressure gas control valve 2 10 and high-pressure gas control valve 3 11 respectively, then open high-pressure gas control valve 5 13 and high-pressure gas control valve 8 16, and judge whether the hydrogen chamber 7 is leaking according to the leakage flow meter 22;

[0038] Water oxygen chamber 8 leakage detection method: by selecting different pressures, open one of the high pressure gas control valve 1 9, the high pressure gas control valve 2 10 and the high pressure gas control valve 3 11 respectively, then open the high pressure gas control valve 5 13 and the high pressure gas control valve 9 17, and judge whether the water oxygen chamber 8 is leaking according to the leakage flow meter 22;

[0039] Detection method of hydrogen chamber 7 leaking into water oxygen chamber 8: by selecting different pressures, open one of high pressure gas control valve 1 9, high pressure gas control valve 2 10 and high pressure gas control valve 3 11 respectively, open high pressure gas control valve 5 13, high pressure gas control valve 8 16 and high pressure gas control valve 13 21, and judge whether hydrogen chamber 7 leaks into water oxygen chamber 8 according to leak flow meter 23;

[0040] Detection method of water-oxygen chamber 8 leaking into hydrogen chamber 7: by selecting different pressures, open one of high-pressure gas control valve 1 9, high-pressure gas control valve 2 10 and high-pressure gas control valve 3 11 respectively, open high-pressure gas control valve 5 13, high-pressure gas control valve 9 17 and high-pressure gas control valve 12 20, and judge whether the water-oxygen chamber 8 leaks into the hydrogen chamber 7 according to the leakage flowmeter 23.

[0041] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A PEM bipolar plate airtightness detection assembly, characterized in that: It comprises an independent frame (1), a high-pressure gas storage tank (2) is fixedly provided on the inner wall of the bottom of the independent frame (1), and a detection circuit fixing plate (3) fixed in the independent frame (1) is provided behind the high-pressure gas storage tank (2); A high-pressure pressure reducing valve 1 (4), a high-pressure pressure reducing valve 2 (5), and a high-pressure pressure reducing valve 3 (6) are fixedly penetrated on one side of the independent frame (1), and the high-pressure pressure reducing valve 1 (4), a high-pressure pressure reducing valve 2 (5), and a high-pressure pressure reducing valve 3 (6) are sequentially distributed from top to bottom. A hydrogen chamber (7), a water-oxygen chamber (8), a high-pressure gas control valve 1 (9), a high-pressure gas control valve 2 (10), a high-pressure gas control valve 3 (11), a high-pressure gas control valve 4 (12), a high-pressure gas control valve 5 (13), a high-pressure gas control valve 6 (14), a high-pressure gas control valve 7 (15), a high-pressure gas control valve 8 (16), a high-pressure gas control valve 9 (17), a high-pressure gas control valve 10 (18), a high-pressure gas control valve 11 (19), a high-pressure gas control valve 12 (20), a high-pressure gas control valve 13 (21), an external leakage flowmeter (22), a cross-leakage flowmeter (23), a shunt block 1 (24), a shunt block 2 (25), and a gas circuit block (26) are fixedly provided on the detection circuit fixing plate (3).

2. A PEM bipolar plate airtightness detection assembly according to claim 1, characterized in that: The high-pressure gas storage tank (2) is connected to the high-pressure pressure reducing valve (4), the high-pressure pressure reducing valve (5), and the high-pressure pressure reducing valve (6) through the diverter block (24); the high-pressure pressure reducing valve (4), the high-pressure pressure reducing valve (5), and the high-pressure pressure reducing valve (6) are respectively connected to the high-pressure gas control valve (9), the high-pressure gas control valve (10), and the high-pressure gas control valve (11) through the diverter block (24).

3. A PEM bipolar plate airtightness detection assembly according to claim 1, characterized in that: The high-pressure gas control valve one (9), the high-pressure gas control valve two (10), and the high-pressure gas control valve three (11) are connected to the external leakage flow meter (22) and the high-pressure gas control valve five (13) through the diverter block two (25).

4. A PEM bipolar plate airtightness detection assembly according to claim 1, characterized in that: The high-pressure gas control valve four (12) is connected to the front end of the external leakage flow meter (22) to perform front end exhaust, and the high-pressure gas control valve six (14) is connected to the rear end of the external leakage flow meter (22) to perform rear end exhaust.

5. A PEM bipolar plate airtightness detection assembly according to claim 1, characterized in that: The high-pressure gas-controlled valve five (13) is respectively connected to the high-pressure gas-controlled valve seven (15), the high-pressure gas-controlled valve eight (16), and the high-pressure gas-controlled valve nine (17) through the gas circuit block (26); the high-pressure gas-controlled valve eight (16) is connected to the hydrogen chamber (7); the high-pressure gas-controlled valve nine (17) is connected to the water-oxygen chamber (8); the hydrogen chamber (7) is connected to the leakage flowmeter (23) through the high-pressure gas-controlled valve twelve (20); and the hydrogen chamber (7) is connected to the leakage flowmeter (23) through the high-pressure gas-controlled valve thirteen (21).

6. A PEM bipolar plate airtightness detection assembly according to claim 1, characterized in that: The high-pressure gas control valve ten (18) is connected to the hydrogen chamber (7), and the high-pressure gas control valve eleven (19) is connected to the water-oxygen chamber (8).

7. A PEM bipolar plate airtightness detection assembly according to claim 1, characterized in that: The gas circuit block (26) is fixedly provided with a pressure transmitter for detecting the circuit pressure.

8. A PEM bipolar plate airtightness detection assembly according to claim 1, characterized in that: A precision pressure reducing valve (27), a first high-pressure muffler (28) and a second high-pressure muffler (29) are fixedly arranged on the detection circuit fixing plate (3).

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